Hey, anyone here have any experience in doing up large scale graphics like banners & billboards? I've got some projects coming up at work starting with 2' x 6' banners and eventually going up to 10' x 20' billboards. I've done lots of magazine ads and brochures at this point, but I'm honestly not quite sure what specs to use for such large scale projects. 300 dpi CMYK? Or do I need to go higher (or lower)? Any tips anyone can provide would be great.